Question

Calcium carbonate (CaCO3) is a white solid with no odor. When CaCO3 is heated, the resulting substances are
calcium oxide (Cao) and carbon dioxide (CO2). CaO is a white to gray solid with no odor, and CO2 is a gas with no
odor and color.
Which statement describes CaCO3?
It is a diatomic molecule that can't be broken down by physical means.
It is a diatomic molecule that can't be broken down by chemical means.
It is a compound that can be broken down by physical means.
It is a compound that can be broken down by chemical means.

Answer 1

Answer:

Thus, we can conclude that calcium carbonate is a compound that can be broken down by chemical means.

Explanation:

Calcium carbonate is a compound that can be broken down by chemical means.

The given compounds;

reactant = CaCO₃

product = CaO + CO₂

In a chemical reaction called thermal decomposition, lime stone also known as calcium carbonate can be broken down when heat is applied to it. It is a chemical process because new substances such as quick lime (calcium oxide) and carbon iv oxide will be formed.

The overall reaction is given as;

CaCO₃  → CaO + CO₂

Thus, we can conclude that calcium carbonate is a compound that can be broken down by chemical means.